Based on the diagram shown, how many electrons does this atom have?
a.six
b.three
c.nine
d.one

Answer:

Vanadium (VI) Phosphide

Explanation:

Vanadium has a 6+ charge for this compound, so there needs to be two phosphorus atoms to satisfy the charges. This is an ionic compound as well so the roman numerals need to be present.

Answer:

his means 1 mole of butane has a volume of 22.4dm3 at STP. 1 mole of butane has the same mass in grams as its relative molecular mass.

In a controlled experiment, an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. The researcher can operationalize (i.e. define) the variables being studied so they can be objectivity measured.

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Answer:

c

Explanation:

protons are the atomic number which define an element

Answer:

the answer is true

Explanation:

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Answer:

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Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.

Answer:

nine electrons

Explanation:

Answer:

There are 9 total electrons. There is always the same number of protons and neutrons so the charge in the atom balances out. The atomic number is the number of protons, and electrons.

Explanation:

Answer:

Percient yield of reaction: 85 %

Explanation:

The reaction is:

PCl₃ + 3H₂O → H₃PO₃ + 3HCl

We only have data from the chloride, so we assume water is in excess. We convert the mass to moles:

62 g . 1mol / 137.32 g = 0.452 mol

If ratio is 1:3, from 0.452 mol we would produce three times as big, that amount. (0.452 . 3) = 1.36 moles of HCl.

We convert the amount to mass.

1.36 mol . 36.45g / 1mol = 49.4 g

This value of produced HCl is the theoretical yield. To determine the percent yield we make:

(Yield produced / Theoretical yield) . 100

(42 g / 49.4g) . 100 = 85%

Answer:

Yes it is 85.0%

Explanation:

Explanation:

You're mixing magnesium nitrate, Mg(NO3)2 , and sodium carbonate, Na2CO3 , two soluble ionic compounds that dissociate completely in aqueous solution to form cations and anions.

Answer:

Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.

Explanation:

The reaction is included in a redox reaction

Further explanation:

Given

Reaction

2 Ca + O₂ → 2 CaO

Required

a redox reaction

Solution

Redox reactions are reactions where there is a change in oxidation number

Oxidation is an increase/increase in oxidation number, while reduction is a decrease/decrease in oxidation number.

Reducing agents are substances that experience oxidation  and oxidizing agent are substances that experience reduction

in the above reaction is included in a redox reaction because there is a change in oxidation number

Ca⇒Ca²⁺+ 2e⁻(for balanced equation : 2Ca⇒2Ca²⁺+4e⁻)

Oxidation ( 0 to +2)

O₂+2e⁻⇒O²⁻(for balanced equation : O₂+4e⁻⇒2O²⁻)

Reduction (0 to -2)

Answer:

The laboratory demonstration consists of the following;

The compounds present in the combustion reaction = Methane, CH₄ and Oxygen, O₂

The chemical equation for the combustion reaction is given as follows;

CH₄ + 2O₂ → CO₂ + 2H₂O

Therefore;

A. The equation given as CH₄ + O → CO₂ is not correct because;

1) Oxygen gas exist as diatomic molecules, O₂, and given that the experiment involves the mixture of gases, the oxygen gas present which can exist as a separate compound, should be represented as O₂

2) The number of oxygen molecules in the reaction is two rather than one

3) The product also includes two molecules of water (vapor) H₂O

B. The correct equation for the reaction should be given as follows;

CH₄ + 2O₂ → CO₂ + 2H₂O

B i) The constituents of the equation is obtained by the knowledge of the fact that the combustion reaction of an organic substance such as methane in the presence of oxygen yields, carbon dioxide and water (vapor)

The equation showing the relative amounts the reacting compounds is by balancing the basic equation of the combustion of methane in the presence of oxygen

Explanation:

The precipitate that will be formed : AgF

One indication of the double displacement reaction is the precipitation reaction

Solubility Rules:  

• 1. soluble compound  

All compounds of Li +, Na +, K +, Rb +, Cs +, and NH4 +  

All compounds of NO₃⁻ and C₂H₃O₂⁻  

Compounds of Cl−, Br−, I− except Ag⁺, Hg₂²⁺, Pb²⁺  

Compounds of SO₄²⁻ except for Hg₂²⁺, Pb²⁺, Sr²⁺, Ba²⁺  

• 2. insoluble compounds  

Compounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li +, Na +, K +, Rb +, Cs +, and NH₄ +  

Compounds of OH− except Compounds of Li +, Na +, K +, Rb +, Cs +, NH₄⁺, Sr²⁺, and Ba²⁺  

Reaction

NaF(aq) + AgNO₃(aq) →NaNO₃(aq)+ AgF(s)

From the solubility rules above, it has been shown that the salts of the Ag⁺ cations are insoluble salts

Answer:

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Explanation:

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the electronic configuration of vanadium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

The systematic distribution of electrons in the various atomic orbitals is called its electronic configuration. The atomic number of vanadium is 23. The electronic configuration of vanadium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³. The noble gas electronic configuration of vanadium is  [Ar]3d³4s². 1,2,3 represents the number of shells and s and represents the orbitals. The superscripts represents the number of electrons in each orbitals.

Therefore, the electronic configuration of vanadium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³.

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Answer:

3 electrons

Explanation:

Answer:Number of electrons that are present in an atom is determined by the electronic configuration of that atom.

If an ion is carrying a positive charge, it means that the atom has lost electrons and if an ion is carrying a negative charge, it means that the atom has gained electrons.

For the given options:

Option A: The atomic number of hydrogen atom is 1 and the electronic configuration for  ion will be:  

Thus, this atom does not have any electrons.

Option B: The atomic number of bromine atom is 35 and the electronic configuration for  ion will be:  

Thus, this atom has 36 electrons.

Option C: The atomic number of aluminium atom is 13 and the electronic configuration for  ion will be:

Explanation:

Answer:

repulsion

Explanation:

Answer:

Explanation:

In contrast to the attractive force between two objects with opposite charges, two objects that are of like charge will repel each other. ... Similarly, a negatively charged object will exert a repulsive force upon a second negatively charged object. Objects with like charge repel each other.

Answer:

1.mole allows us to weigh convenient amounts of material containing known numbers of atoms; i.e., it allows us to count atoms

2. H202 :34.0147 g/mol

C2H6: 30.07 g/mol

Answer:

It is b

Explanation: I did it on the test and got it right

The moles of water are produced when 5 moles of hydrogen gas react with 2 moles of oxygen gas - b. 4 moles of water

The stoichiometric coefficients can be considered in a balanced equation as moles of reactants needed or moles of products formed in the reaction.  

2H2 + O2 → 2H2O  

Thus, the moles of water are produced when 5 moles of hydrogen gas react with 2 moles of oxygen gas - b. 4 moles of water

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Answer:

the answer is c IBr3

Explanation:

The chemical formula for iodine tribromide is IBr₃ as it has 1 iodine and 3 bromine atoms.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

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Answer: D: by their atomic number

Explanation:

Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods

Answer:

-415.5°F (-248.6°C)

Explanation:

Answer: The melting point/condensation point of neon is 24.53888889. Of course, I'm sure you can round that. The freezing point would be 521.74. All of this is in Kelvin

Answer:

0

Explanation:

Point J is on neither plane X or plane Y.  Hope this helps you.

Answer:

3

Explanation:

Answer: The spectrum would be continuous

Explanation:

Atomic transitions allow us to find that the correct answer to what would happen if there was no quantization is:

          d. the spectrum would be continous

In the models of atoms the correct explanation for the energy was given by Planck, by establishing that the energy of an electron is:  

           E = h ν

Where E is the energy, h the Planck constant and ν the frequency.

Therefore a transition occurs as the jump of an electron from one level to another  

          ΔE = E₂ - E₁

In all atomic models the levels are discrete, so the jumps are also discrete.

If the levels were continuous, the energy difference between the lines disappears and we have a continuous emission spectrum.

Let's review the different answers:

a. False. The lines disappear

b. False. This for if the separation between levels increases, which is the opposite process to the one analyzed.

c. False. The lines disappear

d) True. The spectrum is a continuum without any separation.

In conclusion, using the atomic transitions we find that the correct answer for what would happen if there was no quantization is:

     d. the spectrum would be constnuous

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Answer: I believe it is the number of protons.